ApplicationApplication StoriesAutomation NotebookAutomationDirect SpotlightEnergy/UtilitiesIndustryIssue 20 – 2011Learning ResourcesMotion ControlNotebook IssuePLCProcess ControlProductProgrammable ControlStudent SpotlightStudent Spotlight

Multi-Mirror Solar Array Pleasantville High School

The Industrial Technology students at Pleasantville High School, in Pleasantville, Iowa (southeast of Des Moines), have spent the last three years building a multi-mirror solar array. Students from four different technology classes have contributed to the project over the three year period; the AutoCAD and drafting classes have helped design and document the project, students…
Top 10 Tips: Specifying VFDs (Part One of a Two-Part Series)
+Tech TopicsApplicationAutomation NotebookEnergy/UtilitiesIndustryIssue 20 – 2011Learning ResourcesMachine ControlNotebook IssueProductProgrammable ControlTechnology BriefVariable Speed Drives

Top 10 Tips: Specifying VFDs (Part One of a Two-Part Series)

This is part one of a two-part series on variable frequency drives. VFDs can reduce energy consumption, improve real-time control, and lengthen motor life; selecting the right one for your application requires asking the correct questions. Here are some expert tips to consider. Determine if a VFD is right for your application. The primary function of…
Upgrading Pump Stations with PLCs
ApplicationApplication StoriesAutomation NotebookFeature StoryIssue 20 – 2011Learning ResourcesMotor ControlsNotebook IssuePLCProcess ControlProductProgrammable Control

Upgrading Pump Stations with PLCs

When relays and timer circuits get old, they cause problems. Replacing them with PLCs keeps pumps running smoothly. One of the most important jobs of a water distribution system is to reliably deliver water to its customers. At our water district in California, we had pumping stations (Figure 1) with relay-based controls that were more…